Titanium alloy thick-walled spherical head melon-shaped longitudinal seam groove milling fixing device and processing method

Abstract

The present invention belongs to the field of milling processing of longitudinal seam bevels of titanium alloy thick-walled spherical head melon slices, and specifically relates to a milling fixing device and processing method for longitudinal seam bevels of titanium alloy thick-walled spherical head melon slices. The fixing device includes a bottom support seat and a vertical support frame, and the bottom support seat is equipped with at least two groups of bottom clamping seats that can fix and clamp the large ends of melon slice parts, and the bottom clamping seats are provided with a bottom adjustment mechanism; the vertical support frame is equipped with at least two groups of top clamping seats that can fix and clamp the small ends of melon slice parts, and the top clamping seats are provided with a top adjustment mechanism; and also includes a height adjustment mechanism for adjusting the height of the melon slice parts. The present invention is simple to operate, position and fix the melon slice parts, and has accurate positioning; it is convenient for mass processing and positioning of melon slice parts of the same specification, and the processing efficiency is significantly improved, which is convenient for efficient and high-precision milling processing of longitudinal seam bevels of titanium alloy thick-walled spherical head melon slice parts.

Description

Technical Field

[0001] The invention belongs to the field of milling processing of longitudinal seam grooves of titanium alloy thick-walled spherical heads, and in particular relates to a device and method for milling processing of longitudinal seam grooves of pressure heads of deep-sea high-pressure titanium alloy equipment. Background Art

[0002] Conventional pressure vessel melon-segment spliced ​​heads can meet the design requirements after melon-segment forming and welding according to corresponding standards. Usually, the longitudinal seam bevel of the melon-segment after forming can be spliced, welded and inspected by gas cutting and grinding. Mechanical processing is generally not used for bevel finishing. Technologies such as batch processing, high-precision, convenient processing and process control methods of the longitudinal seam bevel of the spherical head melon-segment need to be overcome.

[0003] Titanium alloy thick-walled external pressure and high-pressure equipment spherical heads have high requirements for forming accuracy, high requirements for the outer diameter, inner diameter, and wall thickness of the final spherical container, and high requirements for surface state to meet the use of equipment in deep-sea high-pressure conditions. At the same time, given the high price of titanium alloy raw materials, the inner and outer surface allowances of the spherical head melon segments need to be precisely controlled, and then the forming of the melon segments and the processing accuracy of the melon segment longitudinal seam groove need to be precisely controlled to achieve precise control of the melon segment outline size and groove shape size, angle, etc.

[0004] In view of the fact that the pressing and heat treatment results of the titanium alloy spherical head melon slice parts have certain shape, position and dimensional deviations, and the melon slice parts are spatial structures, there are great technical difficulties in clamping, positioning, and allowance distribution before machining, especially the urgent demand for mass production of melon slice parts for processing quality and efficiency. Therefore, the art needs a titanium alloy thick-walled spherical head melon slice longitudinal seam bevel milling and fixing device and method, and in particular, it is necessary to provide a titanium alloy thick-walled spherical head melon slice longitudinal seam bevel high-precision and high-efficiency milling method. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a titanium alloy thick-walled spherical head melon wedge longitudinal seam bevel milling and fixing device which is convenient for efficient and high-precision milling of the longitudinal seam bevel of the titanium alloy thick-walled spherical head melon wedge parts.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] A titanium alloy thick-walled spherical head melon segment longitudinal seam bevel milling and fixing device comprises a bottom support seat and a vertical support frame, wherein the bottom support seat and the vertical support frame are an integrated structure; the bottom support seat is provided with at least two groups of bottom clamping seats which can be fixedly clamped on the large end of the melon segment parts, and the bottom clamping seats are provided with a bottom adjustment mechanism; the vertical support frame is provided with at least two groups of top clamping seats which can be fixedly clamped on the small end of the melon segment parts, and the top clamping seats are provided with a top adjustment mechanism; and it also comprises a height adjustment mechanism for adjusting the height of the melon segment parts.

[0008] As a preferred technical solution, the bottom clamping seat has a bottom clamping groove for the large end of the melon slice part to extend into.

[0009] As a preferred technical solution, the bottom adjustment mechanism includes two threaded holes relatively arranged on the groove wall of the bottom clamping groove, and bottom adjustment bolts are respectively installed in the threaded holes from outside to inside.

[0010] As a preferred technical solution, the force direction of the bottom adjusting bolt is the normal direction of the corresponding point of the melon slice part.

[0011] As a preferred technical solution, the top clamping seat has a top clamping groove for the small end of the melon slice part to extend into.

[0012] As a preferred technical solution, the top adjustment mechanism includes two threaded holes relatively arranged on the groove wall of the top clamping groove, and top adjustment bolts are respectively installed in the threaded holes from outside to inside.

[0013] As a preferred technical solution, the force direction of the top adjusting bolt is the normal direction of the corresponding point of the melon slice part.

[0014] The present invention also provides a processing method using the titanium alloy thick-walled spherical head melon segment longitudinal seam groove milling fixing device described above, comprising the following steps:

[0015] S1. After the titanium alloy thick-walled head melon slice parts are pressed and formed, the reference baseline and machining allowance line are drawn;

[0016] S2, preliminarily positioning the fixture on the machining rotary platform, installing the melon slice part on the fixture, and adjusting the position of the melon slice part and distributing the machining allowance through the adjustment mechanism;

[0017] S3, determining the machining coordinate system and coordinates of the CNC machine tool and the melon slice part and compiling a machining program, milling the groove on one side of the melon slice according to the program, rotating the rotary platform to a corresponding angle after molding, and then milling the groove on the other side;

[0018] S4. Install, fine-tune and fix the melon slice parts one by one in batches, and process the grooves on both sides according to the above steps.

[0019] In step S1, after the melon slice parts are pressed and formed, the reference baseline and processing allowance line of the tube sheet are preliminarily determined by marking. The subsequent installation and alignment of the melon slice parts are positioned based on the reference baseline, and the processing position is accurately determined by machine tool meter detection.

[0020] In step S2, the fixing device is installed on the rotary platform matched with the machine tool, and the preliminary installation is carried out with the rotation center of the rotary platform as the center of the circle; the bottom adjusting bolt and the top adjusting bolt of the fixing device are respectively adjusted to the maximum gap position, the melon slice part is installed from the side of the fixing device and pushed into the inside of the fixing device, and the position of the melon slice part is adjusted by the bottom adjusting bolt, the top adjusting bolt and the height adjustment mechanism; the position of the melon slice part is detected by the machine tool metering method, and the inner and outer surfaces, the upper and lower end faces and the longitudinal seam groove allowances on both sides are allocated; after the position is determined, the integral bracket composed of the bottom support seat and the vertical support frame is fixed to the rotary platform of the machine tool, and the bottom adjusting bolt, the top adjusting bolt and the height adjustment mechanism are locked, and the final clamping size detection is carried out by the machine tool metering detection method.

[0021] In step S2, the force directions of the bottom adjusting bolt and the top adjusting bolt are both the normal directions of the corresponding points on the spherical surface of the melon slice part, and the force points of the two corresponding inner and outer bolts are the same, so that the parts are evenly stressed and the clamping is stable.

[0022] In step S2, the height adjustment mechanism can select one or more groups according to the specific size of the melon slice parts, and the height position of the melon slice parts can be adjusted by adjusting the height of the height adjustment mechanism. After finally adjusting to the right position, the melon slice parts are locked and fixed by self-locking bolts.

[0023] In step S2, the melon slice part is aligned with the rotation center of the rotary platform as the center of the circle during position adjustment, so that the longitudinal seam grooves on both sides of the same melon slice part can be processed in one alignment and clamping.

[0024] In step S3, the rotation center of the machine tool rotary platform is used as the coordinate center, and the processing program is compiled according to the radius and specific dimensions of the groove required by the melon slice part processing drawing, and the groove processing on one side is performed; when processing the longitudinal seam groove at the other end, this method only needs to rotate the machine tool rotary platform to a corresponding angle, and then the longitudinal seam groove can be processed according to the above method, without the need for re-alignment and adjustment.

[0025] After the position adjustment of the fixture in step S2 is completed, the position of the fixture remains unchanged during the batch processing of melon slice parts. In step S4, each time the melon slice parts are replaced, it is only necessary to adjust the bottom adjustment bolt and the top adjustment bolt to meet the disassembly and assembly space requirements. After the batch melon slice parts are installed on the fixture, the bottom adjustment bolt, the top adjustment bolt and the height adjustment mechanism are fine-tuned. After the machine tool is checked and tightened, the longitudinal seam groove processing can be carried out according to the above method.

[0026] Due to the adoption of the above technical scheme, the present invention has at least the following beneficial effects: the installation, positioning and fixing operation of the fixing device for the melon slice parts are simple and the positioning is accurate; it is convenient for the mass processing and positioning of the melon slice parts of the same specification, and the processing efficiency is significantly improved, which facilitates the efficient and high-precision milling of the longitudinal seam grooves of the titanium alloy thick-walled spherical head melon slice parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0028] Figure 1 1 is a schematic diagram of the structure of a titanium alloy thick-walled spherical head melon-shaped longitudinal seam groove milling and fixing device in an embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of the main structure when the fixing device in the embodiment of the present invention is used to clamp and fix the melon slice part;

[0030] Figure 3 It is a schematic diagram of the three-dimensional structure when the melon slice part is clamped and fixed by the fixing device in the embodiment of the present invention. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described only by way of illustration. Needless to say, those of ordinary skill in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0032] like Figures 1 to 3As shown, a titanium alloy thick-walled spherical head melon slice longitudinal seam groove milling fixture (hereinafter referred to as the fixture) includes a bottom support seat 1 and a vertical support frame 2. The bottom support seat 1 and the vertical support frame 2 are an integrated structure, made of HW300×300 steel, and constitute the main frame of the whole device; the bottom support seat 1 is equipped with two groups of bottom clamping seats 4 that can fix and clamp the large ends of the melon slice parts 3, and the bottom clamping seats 4 are provided with a bottom adjustment mechanism; the vertical support frame 2 is equipped with two groups of top clamping seats 5 that can fix and clamp the small ends of the melon slice parts 3, and the top clamping seats 5 are provided with a top adjustment mechanism; the bottom clamping seats 4 are fixed to the bottom support seat 1 by welding, and the top clamping seats 5 are fixed to the vertical support frame 2 by welding; and it also includes a height adjustment mechanism 6 for adjusting the height of the melon slice parts 3.

[0033] The bottom clamping seat 4 has a bottom clamping groove 41 for the large end of the melon segment part 3 to extend into. The bottom adjustment mechanism includes two threaded holes arranged on the groove wall of the bottom clamping groove 41, and bottom adjustment bolts 42 are installed in the threaded holes from outside to inside. The bottom adjustment bolts 42 are used for alignment adjustment and locking of the melon segment part 3. To ensure that the bottom adjustment bolts 42 do not damage the contact surface of the spherical melon segment part 3, the head of the bottom adjustment bolts 42 is rounded. The force direction of the bottom adjustment bolts 42 is the normal direction of the corresponding point of the melon segment part.

[0034] The top clamping seat 5 has a top clamping groove 51 for the small end of the melon segment part 3 to extend into. The top adjustment mechanism includes two threaded holes arranged on the groove wall of the top clamping groove 51, and top adjustment bolts 52 are installed in the threaded holes from outside to inside. Similarly, to ensure that the top adjustment bolt 52 does not damage the contact surface of the spherical melon segment part 3, the head of the top adjustment bolt 52 is rounded, and the force direction of the top adjustment bolt 52 is the normal direction of the corresponding point of the melon segment part.

[0035] The height adjustment mechanism 6 can adopt a mechanical jack structure for adjusting the height direction of the melon slice part 3, and multiple parts can be used in combination as needed.

[0036] The processing method for milling the longitudinal groove of the melon slice part using the above-mentioned fixing device comprises the following steps:

[0037] S1. After the titanium alloy thick-walled head melon slice parts are pressed and formed, the reference baseline and machining allowance line are drawn;

[0038] S2, preliminarily positioning the fixture on the machining rotary platform, installing the melon slice part on the fixture, and adjusting the position of the melon slice part and distributing the machining allowance through the adjustment mechanism;

[0039] S3, determining the machining coordinate system and coordinates of the CNC machine tool and the melon slice part and compiling a machining program, milling the groove on one side of the melon slice according to the program, rotating the rotary platform to a corresponding angle after molding, and then milling the groove on the other side;

[0040] S4. Install, fine-tune and fix the melon slice parts one by one in batches, and process the grooves on both sides according to the above steps.

[0041] In step S1, after the melon slice parts are pressed and formed, the reference baseline and processing allowance line of the tube sheet are preliminarily determined by marking. The subsequent installation and alignment of the melon slice parts are positioned based on the reference baseline, and the processing position is accurately determined by machine tool meter detection.

[0042] In step S2, the fixing device is installed on the rotary platform matched with the machine tool, and the preliminary installation is carried out with the rotation center of the rotary platform as the center of the circle; the bottom adjusting bolt and the top adjusting bolt of the fixing device are respectively adjusted to the maximum gap position, the melon slice part is installed from the side of the fixing device and pushed into the inside of the fixing device, and the position of the melon slice part is adjusted by the bottom adjusting bolt, the top adjusting bolt and the height adjustment mechanism; the position of the melon slice part is detected by the machine tool metering method, and the inner and outer surfaces, the upper and lower end faces and the longitudinal seam groove allowances on both sides are allocated; after the position is determined, the integral bracket composed of the bottom support seat and the vertical support frame is fixed to the rotary platform of the machine tool, and the bottom adjusting bolt, the top adjusting bolt and the height adjustment mechanism are locked, and the final clamping size detection is carried out by the machine tool metering detection method.

[0043] In step S2, the force directions of the bottom adjusting bolt and the top adjusting bolt are both the normal directions of the corresponding points on the spherical surface of the melon slice part, and the force points of the two corresponding inner and outer bolts are the same, so that the parts are evenly stressed and the clamping is stable.

[0044] In step S2, the height adjustment mechanism can select one or more groups according to the specific size of the melon slice parts, and the height position of the melon slice parts can be adjusted by adjusting the height of the height adjustment mechanism. After finally adjusting to the right position, the melon slice parts are locked and fixed by self-locking bolts.

[0045] In step S2, the melon slice part is aligned with the rotation center of the rotary platform as the center of the circle during position adjustment, so that the longitudinal seam grooves on both sides of the same melon slice part can be processed in one alignment and clamping.

[0046] In step S3, the rotation center of the machine tool rotary platform is used as the coordinate center, and the processing program is compiled according to the radius and specific dimensions of the groove required by the melon slice part processing drawing, and the groove processing on one side is performed; when processing the longitudinal seam groove at the other end, this method only needs to rotate the machine tool rotary platform to a corresponding angle, and then the longitudinal seam groove can be processed according to the above method, without the need for re-alignment and adjustment.

[0047] After the position adjustment of the fixture in step S2 is completed, the position of the fixture remains unchanged during the batch processing of melon slice parts. In step S4, each time the melon slice parts are replaced, it is only necessary to adjust the bottom adjustment bolt and the top adjustment bolt to meet the disassembly and assembly space requirements. After the batch melon slice parts are installed on the fixture, the bottom adjustment bolt, the top adjustment bolt and the height adjustment mechanism are fine-tuned. After the machine tool is checked and tightened, the longitudinal seam groove processing can be carried out according to the above method.

[0048] In summary, the fixing device of the present invention is simple to operate and accurately positions the installation, positioning and fixing of melon slice parts; it is convenient for mass processing and positioning of melon slice parts of the same specification, and the processing efficiency is significantly improved, which facilitates the efficient and high-precision milling of the longitudinal seam grooves of titanium alloy thick-walled spherical head melon slice parts.

[0049] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. Titanium alloy thick-walled spherical head melon-shaped longitudinal seam groove milling and fixing device, characterized by: The cam is a bottom support frame and a bottom support frame, and the bottom support frame has at least two sets of bottom clamping seats that can be fixedly clamped on the large end of the melon slice part, and the bottom clamping seat has a bottom clamping groove for the large end of the melon slice part to extend into; the bottom clamping seat is provided with a bottom adjusting mechanism for adjusting the bottom of the melon slice part; the bottom adjusting mechanism includes two threaded holes that are relatively arranged on the groove wall of the bottom clamping groove, and the bottom adjusting bolts are respectively installed from the outside to the inside in the threaded holes; at least two sets of top clamping seats that can be fixedly clamped on the small end of the melon slice part are installed on the vertical support frame, and the top clamping seat has a top clamping groove for the small end of the melon slice part to extend into; the top clamping seat is provided with a top adjusting mechanism for adjusting the top of the melon slice part, and the top adjusting mechanism includes two threaded holes that are relatively arranged on the groove wall of the top clamping groove, and top adjusting bolts are respectively installed from the outside to the inside in the threaded holes; and it also includes a height adjustment mechanism for adjusting the height of the melon slice part. The processing method of a titanium alloy thick-walled spherical head melon segment longitudinal seam groove milling fixture comprises the following steps: S1. After the titanium alloy thick-walled head melon slice parts are pressed and formed, the reference baseline and machining allowance line are drawn; S2, preliminarily positioning the fixture on the machining rotary platform, installing the melon slice part on the fixture, and adjusting the position of the melon slice part and distributing the machining allowance through the adjustment mechanism; S3, determining the machining coordinate system and coordinates of the CNC machine tool and the melon slice part and compiling a machining program, milling the groove on one side of the melon slice according to the program, rotating the rotary platform to a corresponding angle after molding, and then milling the groove on the other side; S4, batch melon slice parts are installed, fine-tuned and fixed one by one, and the grooves on both sides are processed according to the above steps; Among them, in step S2, the fixing device is installed on the machining rotary platform, and the preliminary installation is carried out with the rotation center of the rotary platform as the center of the circle; the position of the melon slice part is detected by the machine tool dialing method, and the inner and outer surfaces, the upper and lower end faces, and the longitudinal seam groove allowances on both sides are allocated; when the position of the melon slice part is adjusted and aligned, the rotation center of the rotary platform is used as the center of the circle for alignment, so that the longitudinal seam grooves on both sides of the same melon slice part can be processed after one alignment and clamping.

2. The titanium alloy thick-walled spherical head melon-shaped longitudinal seam groove milling and fixing device according to claim 1, characterized in that: The force direction of the bottom adjusting bolt is the normal direction of the corresponding point of the melon slice part.

3. The titanium alloy thick-walled spherical head melon-shaped longitudinal seam groove milling and fixing device according to claim 1, characterized in that: The force direction of the top adjusting bolt is the normal direction of the corresponding point of the melon slice part.

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